.button.dark-single {
  --background: none;
  --rectangle: #242836;
  --success: #4BC793;
}
.button.white-single {
  --background: none;
  --rectangle: #F5F9FF;
  --arrow: #275efe;
  --success: #275efe;
  --shadow: rgba(10, 22, 50, .1);
}
.button.dark {
  --background: #242836;
  --rectangle: #1C212E;
  --arrow: #F5F9FF;
  --text: #F5F9FF;
  --success: #2F3545;
}

.button {
  --background: #275efe;
  --rectangle: #184fee;
  --success: #4672f1;
  --text: #fff;
  --arrow: #fff;
  --checkmark: #fff;
  --shadow: rgba(10, 22, 50, .24);
  display: flex;
  overflow: hidden;
    text-decoration: none;
  -webkit-mask-image: -webkit-radial-gradient(white, black);
  background: var(--background);
  border-radius: 8px;
  box-shadow: 0 2px 8px -1px var(--shadow);
  transition: box-shadow .2s ease, -webkit-transform .2s ease;
  transition: transform .2s ease, box-shadow .2s ease;
  transition: transform .2s ease, box-shadow .2s ease, -webkit-transform .2s ease;
}
.button:active {
  -webkit-transform: scale(0.95);
          transform: scale(0.95);
  box-shadow: 0 1px 4px -1px var(--shadow);
}
.button ul {
  margin: 0;
  padding: 16px 40px;
  list-style: none;
  text-align: center;
  position: relative;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  font-size: 16px;
  font-weight: 500;
  line-height: 28px;
  color: var(--text);
}
.button ul li:not(:first-child) {
  top: 16px;
  left: 0;
  right: 0;
  position: absolute;
}
.button ul li:nth-child(2) {
  top: 76px;
}
.button ul li:nth-child(3) {
  top: 136px;
}
.button > div {
  position: relative;
  width: 60px;
  height: 60px;
  background: var(--rectangle);
}
.button > div:before, .button > div:after {
  content: '';
  display: block;
  position: absolute;
}
.button > div:before {
  border-radius: 1px;
  width: 2px;
  top: 50%;
  left: 50%;
  height: 17px;
  margin: -9px 0 0 -1px;
  background: var(--arrow);
}
.button > div:after {
  width: 60px;
  height: 60px;
  -webkit-transform-origin: 50% 0;
          transform-origin: 50% 0;
  border-radius: 0 0 80% 80%;
  background: var(--success);
  top: 0;
  left: 0;
  -webkit-transform: scaleY(0);
          transform: scaleY(0);
}
.button > div svg {
  display: block;
  position: absolute;
  width: 20px;
  height: 20px;
  left: 50%;
  top: 50%;
  margin: -9px 0 0 -10px;
  fill: none;
  z-index: 1;
  stroke-width: 2px;
  stroke: var(--arrow);
  stroke-linecap: round;
  stroke-linejoin: round;
}
.button.loading ul {
  -webkit-animation: text calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
          animation: text calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
}
.button.loading > div:before {
  -webkit-animation: line calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
          animation: line calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
}
.button.loading > div:after {
  -webkit-animation: background calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
          animation: background calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
}
.button.loading > div svg {
  -webkit-animation: svg calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
          animation: svg calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
}

@-webkit-keyframes text {
  10%,
    85% {
    -webkit-transform: translateY(-100%);
            transform: translateY(-100%);
  }
  95%,
    100% {
    -webkit-transform: translateY(-200%);
            transform: translateY(-200%);
  }
}

@keyframes text {
  10%,
    85% {
    -webkit-transform: translateY(-100%);
            transform: translateY(-100%);
  }
  95%,
    100% {
    -webkit-transform: translateY(-200%);
            transform: translateY(-200%);
  }
}
@-webkit-keyframes line {
  5%,
    10% {
    -webkit-transform: translateY(-30px);
            transform: translateY(-30px);
  }
  40% {
    -webkit-transform: translateY(-20px);
            transform: translateY(-20px);
  }
  65% {
    -webkit-transform: translateY(0);
            transform: translateY(0);
  }
  75%,
    100% {
    -webkit-transform: translateY(30px);
            transform: translateY(30px);
  }
}
@keyframes line {
  5%,
    10% {
    -webkit-transform: translateY(-30px);
            transform: translateY(-30px);
  }
  40% {
    -webkit-transform: translateY(-20px);
            transform: translateY(-20px);
  }
  65% {
    -webkit-transform: translateY(0);
            transform: translateY(0);
  }
  75%,
    100% {
    -webkit-transform: translateY(30px);
            transform: translateY(30px);
  }
}
@-webkit-keyframes svg {
  0%,
    20% {
    stroke-dasharray: 0;
    stroke-dashoffset: 0;
  }
  21%,
    89% {
    stroke-dasharray: 26px;
    stroke-dashoffset: 26px;
    stroke-width: 3px;
    margin: -10px 0 0 -10px;
    stroke: var(--checkmark);
  }
  100% {
    stroke-dasharray: 26px;
    stroke-dashoffset: 0;
    margin: -10px 0 0 -10px;
    stroke: var(--checkmark);
  }
  12% {
    opacity: 1;
  }
  20%,
    89% {
    opacity: 0;
  }
  90%,
    100% {
    opacity: 1;
  }
}
@keyframes svg {
  0%,
    20% {
    stroke-dasharray: 0;
    stroke-dashoffset: 0;
  }
  21%,
    89% {
    stroke-dasharray: 26px;
    stroke-dashoffset: 26px;
    stroke-width: 3px;
    margin: -10px 0 0 -10px;
    stroke: var(--checkmark);
  }
  100% {
    stroke-dasharray: 26px;
    stroke-dashoffset: 0;
    margin: -10px 0 0 -10px;
    stroke: var(--checkmark);
  }
  12% {
    opacity: 1;
  }
  20%,
    89% {
    opacity: 0;
  }
  90%,
    100% {
    opacity: 1;
  }
}
@-webkit-keyframes background {
  10% {
    -webkit-transform: scaleY(0);
            transform: scaleY(0);
  }
  40% {
    -webkit-transform: scaleY(0.15);
            transform: scaleY(0.15);
  }
  65% {
    -webkit-transform: scaleY(0.5);
            transform: scaleY(0.5);
    border-radius: 0 0 50% 50%;
  }
  75% {
    border-radius: 0 0 50% 50%;
  }
  90%,
    100% {
    border-radius: 0;
  }
  75%,
    100% {
    -webkit-transform: scaleY(1);
            transform: scaleY(1);
  }
}
@keyframes background {
  10% {
    -webkit-transform: scaleY(0);
            transform: scaleY(0);
  }
  40% {
    -webkit-transform: scaleY(0.15);
            transform: scaleY(0.15);
  }
  65% {
    -webkit-transform: scaleY(0.5);
            transform: scaleY(0.5);
    border-radius: 0 0 50% 50%;
  }
  75% {
    border-radius: 0 0 50% 50%;
  }
  90%,
    100% {
    border-radius: 0;
  }
  75%,
    100% {
    -webkit-transform: scaleY(1);
            transform: scaleY(1);
  }
}
html {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: inherit;
}
*:before, *:after {
  box-sizing: inherit;
}
/*11.14 wwm 会导致无法点击链接？*/
body {
    /*wwm 弹性会导致子元素无法撑开*/
  /*min-height: 100vh;*/
  /*display: flex;*/
  font-family: 'Roboto', Arial;
  justify-content: center;
  align-items: center;
  background: #E4ECFA;
}
body .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
body .container > div {
  flex-basis: 100%;
  width: 0;
}
body .container .button {
  margin: 16px;
}
@media (max-width: 400px) {
  body .container .button {
    margin: 12px;
  }
}
body .dribbble {
  position: fixed;
  display: block;
  right: 20px;
  bottom: 20px;
}
body .dribbble img {
  display: block;
  height: 28px;
}
